Adding extra IPv4 addresses

Ordering

Add IPv4 addresses on the order page, or later from a ticket: $3 per address per month, up to 16 per server. They are routed to your server’s main IPv4 address, so nothing changes on the network side for your existing address.

On the host itself

# netplan: add the extra address as a /32
      addresses:
        - "203.0.113.10/32"
        - "203.0.113.20/32"

For virtual machines (routed setup)

Because the addresses are routed to your server, the host routes each one to its VM. On Proxmox, create a bridge without a physical port, give it the host’s main address, enable forwarding and add a host route per VM address:

$ sysctl -w net.ipv4.ip_forward=1
$ ip route add 203.0.113.20/32 dev vmbr1

Inside the VM, configure 203.0.113.20/32 with the host’s main address as gateway (on-link).